Occultic;Nine is a Japanese light novel series written by Chiyomaru Shikura, and is a part of the Science Adventure franchise. It was later adapted into a visual novel and published by Mages in November 2017. The light novel series is licensed in English by J-Novel Club. A manga, illustrated by Ganjii, was serialized in Kodansha's good! Afternoon from October 2015 to May 2017. An anime television series adaptation by A-1 Pictures aired between October and December 2016.
The cover of the first light novel volume
Science Adventure is a multimedia series consisting of interconnected science fiction stories, created mainly by Mages, Nitroplus, and Chiyomaru Studio. The main entries mostly take the form of visual novel video games, but side entries span across several different mediums.
Art from a Science Adventure event, featuring characters from the first three main games. Left to right: Rimi (Chaos;Head), Kurisu (Steins;Gate), and Akiho (Robotics;Notes).
In the Steins;Gate games, the player affects the outcome of the story by using the player character's cell phone.